A 25 dBm 95-115 GHz Coupler-Based Traveling-Wave MMIC Power Amplifier in GaAs pHEMT Technology

Paper i proceeding, 2026

This paper presents a 95-115 GHz power amplifier (PA) based on a coupler-enabled traveling-wave combiner/splitter network, implemented in a commercial 0.1 μ m GaAs pHEMT process. Directional couplers provide high inter-branch isolation, suppressing mutual load interactions between the combined unit amplifiers. The PA achieves a saturated output power of 24.5 dBm (± 0.7 dB) across a 20 GHz bandwidth, representing one of the highest reported power levels for GaAs PAs beyond 100 GHz. These results demonstrate the effectiveness of the coupler-based traveling-wave architecture for wideband, high-power W-band MMIC design.